Difference between revisions of "Respiration"
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| + | '''Respiration''' (or just [[breath]]ing) is defined as the transport of [https://en.wikipedia.org/wiki/Oxygen oxygen] from the outside air to the [[cells]] within [https://en.wikipedia.org/wiki/Tissue_(biology) tissues], and the transport of [https://en.wikipedia.org/wiki/Carbon_dioxide carbon dioxide] in the [[opposite]] direction. This is in contrast to the biochemical definition of respiration, which refers to [https://en.wikipedia.org/wiki/Cellular_respiration cellular respiration]: the metabolic [[process]] by which an [[organism]] obtains [[energy]] by reacting oxygen with glucose to give water, carbon dioxide and ATP (energy). Although physiologic respiration is [[necessary]] to sustain cellular respiration and thus life in [[animals]], the processes are distinct: cellular respiration takes place in [[individual]] cells of the animal, while physiologic respiration concerns the bulk [[flow]] and transport of metabolites between the [[organism]] and the external [[environment]]. | ||
| − | + | In unicellular organisms, simple [[diffusion]] is sufficient for gas exchange: every [[cell]] is constantly bathed in the external [[environment]], with only a short distance for gases to flow across. In contrast, [[complex]] multicellular animals such as humans have a much greater distance between the environment and their innermost cells, thus, a [https://en.wikipedia.org/wiki/Respiratory_system respiratory system] is needed for effective gas exchange. The respiratory system works in concert with a [https://en.wikipedia.org/wiki/Circulatory_system circulatory system] to carry gases to and from the tissues. | |
| − | + | Respiratory [[behavior]] is correlated to the cardiovascular behavior to control the gaseous exchange between cells and blood. Both behaviors are [[Intensity|intensified]] by [[exercise]] of the [[body]]. However, respiratory is highly voluntary compared to cardiovascular activity which is [[totally]] involuntary.[https://en.wikipedia.org/wiki/Respiration_%28physiology%29] | |
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| − | Respiratory [[behavior]] is correlated to the cardiovascular behavior to control the gaseous exchange between cells and blood. Both behaviors are [[Intensity|intensified]] by [[exercise]] of the [[body]]. However, respiratory is highly voluntary compared to cardiovascular activity which is [[totally]] involuntary.[ | ||
==See Also== | ==See Also== | ||
| − | *[ | + | *[https://nordan.daynal.org/wiki/index.php?title=Paper_11_-_The_Eternal_Isle_of_Paradise#11:6._SPACE_RESPIRATION Space Respiration] |
[[Category: Biology]] | [[Category: Biology]] | ||
Latest revision as of 02:35, 13 December 2020
Respiration (or just breathing) is defined as the transport of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction. This is in contrast to the biochemical definition of respiration, which refers to cellular respiration: the metabolic process by which an organism obtains energy by reacting oxygen with glucose to give water, carbon dioxide and ATP (energy). Although physiologic respiration is necessary to sustain cellular respiration and thus life in animals, the processes are distinct: cellular respiration takes place in individual cells of the animal, while physiologic respiration concerns the bulk flow and transport of metabolites between the organism and the external environment.
In unicellular organisms, simple diffusion is sufficient for gas exchange: every cell is constantly bathed in the external environment, with only a short distance for gases to flow across. In contrast, complex multicellular animals such as humans have a much greater distance between the environment and their innermost cells, thus, a respiratory system is needed for effective gas exchange. The respiratory system works in concert with a circulatory system to carry gases to and from the tissues.
Respiratory behavior is correlated to the cardiovascular behavior to control the gaseous exchange between cells and blood. Both behaviors are intensified by exercise of the body. However, respiratory is highly voluntary compared to cardiovascular activity which is totally involuntary.[1]
